Pearl Jam, Dave Matthews Band and the Beastie Boys will headline this year's Outside Lands Festival on August 28-30th at San Francisco's Golden Gate Park. M.I.A., Modest Mouse, the Mars Volta, TV on the Radio, the Dead Weather, Mastodon, Ween, Thievery Corporation, Incubus and Jason Mraz round out the fest's initial lineup. Pre-sale tickets start Wednesday, April 15th. Get the entire lineup after the jump. Barring an unexpected tour announcement, the headlining set will mark Pearl Jam's first U.S. concert since their July '08 show at New York's Madison Square Garden, and their first major festival appearance since Bonnaroo '08. The opposite can be said for the Beastie Boys, who seem to be playing every major summer festival this year, including Bonnaroo, All Points West and, reportedly, Lollapallooza. Dave Matthews Band's involvement at Outside Lands comes as no surprise, as the group's August 29th show in San Francisco was listed as "TBA" when his summer tour was announced in mid-February.

The headliners were revealed in an advertisement on the San Francisco Gate page, with the rest of the initial lineup expected to be announced later today on the Outside Lands' official site. No word whether Outside Lands will join their fellow festivals in providing a incremented payment plan for ticket buyers. Last year's Outside Lands featured headliners Radiohead, Tom Petty and Jack Johnson with an under card of Wilco, Beck, Ben Harper and many more taking the stage at the enormous, wooded Golden Gate Park. For photos from last year's inaugural festival, check out the story below: